Improvement in the manufacture of soap



'fiuitet l swat I t (time.

HENRY A. 'PEASE, OF HARTFORD, CONNECTICUT.

Letters Patent No. 83,996, dated November 10, 1868.

IMPROVEMENT IN THE MANUFACTURE OF SOAP.

The Schedule referred to in these Letters Patent and making part of the same.

caustic soda; 'stearine, tallow', or other stock, manufactured by the cold and hot process, hereinafter described, which may be varied according to the quality of soap to be produced.

For the different qualities oi soap manufactured, I use from five (5) to twenty (20) per cent. of flour. The rest is composed of grease, or other stock, and manufactured with caustic lye, by the cold and hot process hereinafter described.

First, I put the grease or oils and caustic lye in a kettle, and boil until the Whole mass is saponified, or becomes hard. The lye must be so heavy in strength as to precipitate to the bottom. There must be heat enough to keep the whole mass hot, and at the same time keep the lye at the bottom.

Secondly, I place, inanother kettle, the proportionate Weight of flour, and add thereto cold water sufiicient to moisten it. I stir it until the whole has become smooth and hard, and all the knobs have been dissolved in the mixture. I then add more cold water,

and stir until it again becomes thick and smooth. I then add more cold water, and stir until it becomes a jelly. I then boil it, and stir until it becomes solid. 1 then try this preparation until it will bear the strength of the heaviest lye. At this point, I add lye until it has the appearance of a finished soap, thick, and free from knobs;

Thirdly, I then take the soap that remains from the first process and place in another kettle, and add thereto about an equal amount of the second preparation, the whole being kept hot to mix. I then stir it until both compounds become united and solid. 1 then try the strength of the soap, and if it has become short, hard, and brittle, and has lost. its fleshy appearance, the soap is in a finished state; if not, I 'add more strength.

I have endeavored to show thenature of this invention, in such a manner that others could manufacture therefrom.

What I claim, and desireto secure by Letters Patcut, is

The manufacture by cold and hot process, and the combination of these two processes, above described, together, thereby obtaining a ,soap which will harden in two hours, when,'by the old process, it requires about five days. 7

HENRY A. PEASE. [L. s.]

Witnesses:

N. SHIPMAN, A. M. FARN'HAM, F. G. MASON. 

